Jack Hammer 4 Slot

Is Jack Hammer 4 the right game for you?

Launched in July 2025, Jack Hammer 4 by NetEnt is a 6x6 cluster pays slot following detective Jack Hammer to China in search of the criminal known as Dragon. The game's unique setup includes various wilds in the corners, sticky win respins, and resetting free spins.

This slot is a long way from the 25 payline, 5 reel original, Jack Hammer, which was launched 14 years prior. Whether you play the first or the latest, exploring them here at PlayOJO means you'll get money back on every spin, win or not, thanks to OJOplus.

Game Info

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Game features

Jack Hammer 4 has 3 main features: sticky wins, corner wilds, and free spins. Here's how they all play out.

Sticky Win

Landing a cluster win of 6 or more adjacent matching symbols or 3 scatter symbols triggers a respin with winning symbols/scatters held in place. Any new scatters or connecting cluster symbols triggers another respin.

Wilds

Each corner of the 6x6 grid contains one of 4 wild symbols or the question mark symbol. By landing a winning cluster next to one of these corner wilds, they'll be activated as follows:

• Expander Wild: Adds up to 4 symbols to the triggering cluster

• Upgrader Wild: Upgrades triggering cluster symbols to those of a higher value

• Multiplier Wild: Triggers 2x to 10x random multiplier

• Cash Prize Wild: Awards 0.5x to 2.5x bet prize

Cluster pays that activate the question mark symbol unlock higher value wilds:

• Expander/Super Expander Wild: Adds up to 16 symbols to the triggering cluster

• Upgrader/Super Upgrader Wild: Upgrades triggering cluster symbols to those of the highest value

• Multiplier Wild: Triggers 30x or 50x random multiplier

• Cash Prize Wild: Awards 10x to 25x bet prize

Free Spins

5 scatter symbols on the grid at once triggers 3 free spins. Multipliers of 1x to 100x can land during free spins and when one does, it resets the free spins count back to 3.

Each corner of the grid contains one of four feature symbols. They are activated when a multiplier symbol lands next to one, triggering the following effects:

• Generate: 3 multiplier symbols are added (up to 3x)

• Unlock: First activation adds the top row, second adds the bottom row (up to 2x)

• Double: Doubles the values of activating multiplier(s) and those adjacent (up to 3x)

• Collect: Adds all visible multipliers, removes them from the grid, and applies them to free spins final wins

My verdict

I was curious to see what Jack's 4th adventure had in store and was pleasantly surprised to see yet another mechanics shakeup over the previous 3 slots. I love cluster pays and I really enjoyed egging on the addition of symbols on respins towards those corner wilds to trigger them! You don't need to know the story, making this slot suitable for series fans and newcomers alike.

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